Wrench.



A. J. CURTIS. WRENCH. APPLICATION FILED PEB.12, 1910. 983,483. PatentedFeb. 7, 1911.

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ANDREW J. CURTIS, OF EAST WTLLIAIVTSON, NEW YORK, ASSIGNOR OF ONE-HALFTO DANIEL WAGEMAKER, OF EAST WILLIAMSON, NEVV' YORK.

WRENCH.

Specification of Letters Patent.

Application filed February 12, 1910.

Patented Feb. 7, 1911.

Serial No. 543,520.

all whom it may concern:

3e it known that T, Annnnw J. CURTIS, a citizen of the United States,residing at East Williamson, in the county of Wayne and State of NewYork, have invented certain .new and useful Improvements in ii renches;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to wrenches.

Among the objects I have in view are to provide a wrench which can bereadily adjusted, to accommodate difierent sizes of nuts, by the samehand which is used for operating the wrench, to simplify the construction of the various parts, and to promote the durability of thedevice as a whole.

The invention resides in a peculiar form of movable jaw and clutch-looppivotally connected to said movable jaw and embracing the shank of thefixed jaw, said loop carrying a clamping block, between its rearextremities, which is adapted to grip upon the rear edge of said shankcausing the movable jaw to be clamped at any desired position by reasonof the inclination of said clutch-loop.

The invention also consists of means whereby the clutch may be fixed orreleased and the movable arm advanced or retracted by the thumb of thehand which clasps the handle of the wrench.

The invention consists further in the features of construction andcombinations of parts hereinafter described and specified in the claim.

in the accompanying drawing: Figure 1 is a side View of a wrenchconstructed in accordance with my invention. Fig. 2 is a front edge viewwith part broken away. Fig. 3 is a rear edge view with part broken away,and Fig. t is a sectional view of a wrench constructed in accordancewith the showing in the other figures except that its jaws are formedfor gripping pipe.

As here illustrated, I prefer to form the shank 1 integral with thefiXed jaw 2 and handle 3, a should-er 4 being provided at the junctureof said handle and shank to limit the spread of the jaws. The movablejaw 5 has a projection 6 extending along the front edge of the shank.Lugs 7 project inwardly from the movable jaw and the extremity of itsextension for the purpose of retaining these parts in their properpositions during adjustments of said movable jaw.

The clutch-loop 8 is pivoted to the movable aw at 9 about midway of itslength, in eluding its extension 6. The clamping block 10 is pivotedbetween the rear extremities of said clutch-loop. This clamping block ismade of hard tempered steel and is serrated, as at 11, 011 its innerface so as to clamp firmly upon the rear edge of the shank of the fixedjaw when strain is placed upon the jaw. The shank is preferably made ofcast or swaged metal which is softer than the clamping block whereby thelatter will bite into said shank and thus afford a more tenacious gripupon the same. Said block has a broad gripping face to give it a betterhold upon the shank. This gripping face is always presented directly tothe rear edge of the shank, no matter what the position of theclutch-loop may be, because of the pivotal connection between said blockand loop.

On the front of the wrench, the clutchloop is provided with an integralarm or lever 12 extending substantially parallel to but spaced away fromthe projection 6 of the movable jaw. The end of this lever is suitablyformed, as at 13, to fit the thumb which may be engaged therewith foradvancing the movable jaw and bringing the clutchloop into clampingposition. One side of said loop has a projection l t extending along theshank toward the handle and provided with a depression 15. The end ofthe thumb may also be engaged with this depression for turning the clutch-loop into position which releases the clamping block, and also forretracting the movable aw. All of the operations just described as beingperformed by the'thumb upon the lever 12 and projec tion 1% may bereadily accomplished while the fingers of the same hand are claspedaround the handle of the wrench.

I claim:

In a wrench, the combinatioi'i, with a fixed jaw and its shank, and ahandle at the other end of said shank, of a movable aw arranged at thefront edge of said shank, a clutchloop pivotally connected to saidmovable jaw and embracing the shank, means carried by said. loop forgripping the rear edge of said shank, a lever on said loop extendinginto 'lnovable ja-W While the fingers of the same position to be engagedby the thumb for removable jaw while the fingers of the same leasingsaid clutch 100p and advancing said I hand are clasped around thehandle. )0

{ In testimony whereof, I aflix my signahand are grasped around thehandle, and a i ture, in presence of two witnesses.

projection from one side of said 100p eXtend- ANDREV J. CURTIS.

ing along the shank toward the handle and Vitnesses:

adapted to be engaged by the thumb for re- V. A. NORTHUP,

leasing said clutch-loop and retracting the i EDGAR V. KELLY.

